Those are some great pics!
I live in Toledo, and belong to a local fish club that gets tour "behind the scenes" at the Toledo Zoo Aquarium once a year. They do have a very nice collection, and the people that run it are awesome! It's incredible to see if from the other side too!
They've had that giant gourami there forever, and it has creeped me out since I was a young boy!
Did you get any more pics of the walk-though amazon exhibit? The top down view of the arowana, red tail cats, and tsn's is incredible with the natural foliage around them.